1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.util;
24  
25  import java.io.Reader;
26  
27  import java.util.List;
28  
29  /**
30   * <a href="DiffUtil.java.html"><b><i>View Source</i></b></a>
31   *
32   * <p>
33   * This class can compare two different versions of a text. Source refers to the
34   * earliest version of the text and target refers to a modified version of
35   * source. Changes are considered either as a removal from the source or as an
36   * addition to the target. This class detects changes to an entire line and also
37   * detects changes within lines, such as, removal or addition of characters.
38   * Take a look at <code>DiffTest</code> to see the expected inputs and outputs.
39   * </p>
40   *
41   * @author Bruno Farache
42   * @see    com.liferay.portal.kernel.util.DiffUtil
43   */
44  public class DiffUtil {
45  
46      public static List<DiffResult>[] diff(Reader source, Reader target) {
47          return getDiff().diff(source, target);
48      }
49  
50      public static List<DiffResult>[] diff(
51          Reader source, Reader target, String addedMarkerStart,
52          String addedMarkerEnd, String deletedMarkerStart,
53          String deletedMarkerEnd, int margin) {
54  
55          return getDiff().diff(
56              source, target, addedMarkerStart, addedMarkerEnd,
57              deletedMarkerStart, deletedMarkerEnd, margin);
58      }
59  
60      public static Diff getDiff() {
61          return _diff;
62      }
63  
64      public void setDiff(Diff diff) {
65          _diff = diff;
66      }
67  
68      private static Diff _diff;
69  
70  }